What This Connector Is
The Molex 430451419 is the 14-circuit member of the Micro-Fit 3.0 43045 header series — a dual-row board-to-cable header with a 3.00 mm pitch and a locking ramp that secures the mated pair against vibration. It is surface-mount terminated and ships on tape-and-reel for automated placement.
Plating — Gold Mating, Tin Post
The contact carries 15.0 µin (0.38 µm) gold on the mating interface and 100.0 µin (2.54 µm) tin on the solder tail. The gold layer handles the wear cycles at the interface; the heavier tin deposit on the post protects the solder joint from oxidation and supports the higher temperature profile of SMT assembly. This is the standard mixed-plating approach across the 43045 series — it concentrates precious metal where the cycling happens rather than wasting it on the termination side.
Ratings and What They Mean for the Fit
Rated 8 A per contact at 600 V — the voltage headroom is well above what most wire-to-board signal or low-power distribution tasks require, so this part is genuinely capable in power-delivery roles, not just signal. The square pin contact shape matches the standard Micro-Fit 3.0 receptacle interface, and the 4-wall shrouding prevents mis-mate in multi-connector panels. The dual-row layout with 0.390-inch (9.91 mm) insulation height sits above the board surface — confirm the mated receptacle housing has the corresponding standoff to avoid over-compressing the latch. Operating temperature is -40 °C to 105 °C, covered by an LCP glass-filled insulator rated UL94 V-0.
Solder Retention and SMT Considerations
Solder retention features on the post help hold the header in the pad during reflow and any post-assembly handling before the receptacle is mated — meaningful in production flows where the board travels connector-first through the oven. SMT termination is not compatible with through-hole wave processes; verify the board assembly sequence if this is a mixed-technology build.